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(No Model.)

A... P. TI-IAYER.

DIE FOR. MAKINGBARBED METALLIC FENCING. No. 320,825. Patented June 23, 1885.

WITNE55E5= INVENTOR N PETERS, PMh-Lihogmpbu, Washington. D, C.

UNITED STATES PATENT OFFICE.

ANSON P. THAYER, OF BROOKLYN, NFAV YORK, ASSIGNOR TO THOMAS W. HALL, OF SAME PLACE.

DIE FOR MAKING BARBED METALLIC FENCING.

SPEGIPICATION forming part of Letters Patent No. 320,825, dated June 23, 1885.

Application filed November 30, 1883.

T 0 all whom, it may concern.-

Be it known that I, ANSON P. THAYER, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented new and useful Improve ments in Dies for Making Barbed Metallic Fencing, of which the following is a specificat-ion.

This invention relates to making two rods of barbed metallic fencing from a double blank strip, the barbs being located at intervals of an inch or thereabout along the rod, by means of dies which first shear the blank strip apart in a zigzag line along the middle web and form two rods, each having projections and notches of equal length, which projections contain the material for the barbs and the waste material to be cut away between the barbs, and, secondly, shear the waste pieces from the projections of the said rods, and thereby complete the barbs.

The dies consist of two pairs of similar form,

whereof one die has two grooves in the side,

corresponding to the form of the notches to be made, and the other die has two ribs on its side, corresponding to the projections to be made in shearing the blank strip apart, as above stated. These two pairs of dies are placed side by side and located the distance apart equal to the dis tance the barbs are to be apart on the rods; but they may be double, treble, or any multiple of said distance apart, and the blank is fed'along them from one pair to the other, each feed movement being double the distance of the barbs apart on the rods, so that these dies accomplish twice as much work at each operation as similar dies having a single rib and groove, and by making the dies with a greater number of ribs and grooves the length of the feed movements and the amountof work may be correspondingly increased.

Figure 1 is a plan view of a couple of barbed m etallic fencing-rods such as are to be produced from a doubleblank strip by the said improved dies. Fig. 2 is a transverse section of the double blank strip from which the said barbed rods of Fig. 1 are to be produced. Fig. 3 isaplan view of the bed-dies and horizontal section of the movable dies of my invention. Fig. 4 represents diagrams of the horizontal'forms of said dies with a partly-cut blank strip laid (No model.)

thereon to illustrate the operation of said dies; and Fig. 5 represents a front elevation of the dies with a blank strip between them.

For each pair of dies I make one grooved die, a, and one ribbed die, I), die a having two grooves, e, and die I) having two corresponding ribs, f, the grooves and ribs being arranged along one side of the dies, respectively, and so that the plain faces of the dies fit each other at c 01 each side of the ribs and grooves, which also fit each other. The depth of the ribs and grooves is equal to the length of thebarbs g to be made, and the width of the said grooves and ribs is equal to the width of one barb g and one space, h, from which the waste material is to be cut away between the barbs of the respective rods. The width of the die-facesc is half the distance between the bases of the barbs of one rod; but the width of the faces 01 may be less, and except for avoiding the sharp angle that would be formed at one edge of one of the grooves e, and also except that it is better not to have the slit by the first pair of dies terminate at the angle 2', said faces d might be dispensed with altogether, or faces (I may be used in lie-u of faces 0.

The double blank strip to be separated and barbed consists of the two parallel cores or ribs, j, connected by the intermediate thin web, It, and having outer thin webs or flanges, Z. The cores or ribs j are sometimes made more prominent; but the form here shown is considered the best. a"

It will be seen that the blank strip being fed into the dies from the direction indicated by the arrow, Fig. 4, to the side m of the first pair of dies, and then advanced from i to m successively to each operation of the dies, said stripwill be sheared by the first pair of dies in the zigzag line represented across said first pair of dies and between them and the second pair, making two wide projections, 'n, and corresponding notches on the respective rods thus separated from each other, and when crossing the second pair of dies these wide projections a will be cutaway along the dotted lines 1, 2, S, and at, by which the waste pieces 0 will be sheared away and the barbs y will be completed. This result is effected by the pairs of dies being adjusted in such relation to each other that the first pair out along one side of the barbs and one side and end of the waste pieces, and the other pair of dies out along the other side of the barbs and also along the other side and end of the waste pieces by overlapping half the cut of the first pair.

The dies will be mounted in any approved way for operating the movable ones either by a reciprocating stock or by a rocking arm or a shearing-lever, and one pair may be arranged to cut a little in advance of the other pair for dividing the resistance.

The form and dimensions of the ribs and grooves of the dies, and the method of their operation, are similar to the dies represented and claimed by me in another applicatlon for a patent filed simultaneously with this 5 but in that case the dies are constructed with a single rib and groove, and the blank strip feeds only the distance from one barb to another, while in this case the dies have duplicate ribs and grooves, and the blank strips feed twice the distance at each operation, so that these dies accomplish double the amount of work in a given time.

WVhat I claim, and desire to secure by Letters Patent, is-

In dies for simultaneously slitting a double blank strip apart and forming two barbed rods therefrom by ribs and grooves relatively disposed for, first, slitting the strip apart and forming projections containing the material for one barb and the waste to be cut away be tween two barbs alternately with correspond ing notches with one set of ribs and grooves, and, second, shearing the waste pieces by another set of ribs and grooves, said dies consistin g of two separate pairs separately located a distance from each other of two or more barbs apart on each rod, and each pair-having two ribs and grooves, adapting said dies to form two notches and projections and to COID- plete two barbs on each rod by one and the same operation, substantially as described.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

ANSON P. THAYER.

\Vitnesses:

F. A. TI-IAYER, S. H. llIORGAN. 

